Superheated-steam boiler



E. R. FISH.

SUPERHEATED STEAM BOILER. APPLICATION FILED Aue.20. 1918.

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E. R. FISH.

SUPERHEATED STEAM BOILER.

APPLICATION FILED AuG.2o, 191a.

Patented Aug. 24, 1920.

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E. R. FISH. SUPERHEATED STEAM BOILER.

APPLICAHON FILED AUGIZO, I918- Patented Aug. 24, 1920.

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EJB. FISH.

SUPERHEATED STEAM BOILER. APPLICATiONFILEDAUG.20,1918.

1,350,597. Patented Aug- 24, 1920.

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SUPERHEATED STEAM BOILER.

APPLICATION FILED AUG.20| 1918.

1,350,597, Patented Aug. 24; 1920.

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EDWARDS RUSSELL FISH, GE PHOENIXVILLE, PENNSYLVANIA.

SUPERHEATED-STEAM BOILER.

Application filed August 20, 1918. Serial No. 250,661.

To all whom it may concern.-

lle it known that I, Enwnnns RUssnLL FISH, a citizen of the United States, residing at Phoenixville, in the county of Chester and State of Pennsylvania, have invented certain new and useful Improvements in Superheated-Steam Boilers, of which the following is a specification. 7

)nc object of my invention is to provide a superl eated steam boiler in which the super-heater will have portions so located that they will deliver a comparatively large amount of superheated steam and at the same time will be located in such a position as to permit easy access thereto for cle ring or repair purposes.

Another object is to so construct and locate the superheater that any. of the tubes can be easily and quickly repaired or replaced without removingthe entire superheater or any other part thereof.

A further object is to so make my improved boiler and superheater that the tubes of the latter can straddle certain of the parts of the boiler, thus permitting the superheater to be installed without greatly mcreasing the space required by the boiler proper. V v I These ob ects, and other advantageous ends which w1ll. be described hereinafter,

attain in the following manner, reference being had to the accompanying drawings in which Figure l is a sectional elevation taken longitudinally through my improved boiler,

Fig. .2 is a transverse sectional elevation taken on-the line 22 of Fig. 1,

Fig. 3 is a section through the superheater header taken on the line 3-3 of Fig. 2,

i Fig. 1 is a fragmentary section taken on the line 4'4 of F 3, through the superheater header and showing the arrangement of the superheater tubes with relation to the jatlles in the superheater header, 5 is a view of the same general charactor as Fig. 2, showing a modified form of superheater arrangement and made in accordance with my invention,

2 Figs. 6, 7, and S are fragmentary views ofthe same general character toFigs. 2 and?) and showin certain other modified forms of the superheaterarrangement and made in accordance with my invention, F 1g. 8 being a sectlon taken on the line 8 -8 of Fig. 9, and

represents the combustion chamber or fire box, and 7 represents the grates. 8 and 9 respectively represent the front and rear water tube headers which are connected by an inclined bank of water tubes 10. These tubes extend over the fire box 6 and the heat from the latter serves to generate steam within the tubes 10 which passes rearwardly to the boX header 9 and thence through a row of steam conducting tubes 11 to a steam and water drum 12. The latter is arranged transversely of the boiler and is connected by nipples 13 with the top of the front header 8. The steam conducting tubes 11 extend at an angle to the tubes 10 and thus provide a substantially triangular space 1 1 between the uppermost tubes 10 and the tubes 11.

The'tubes 16 are provided with bafiles 15, 16, and 17 and the hot products of combustion are thus compelled to take a circuitous pat i, as indicated by the arrows in Fig. 1, upwardly between the water tubes so as to efficiently heat them to produce steam and then pass into the space 1 1 and eventually out of a flue outlet 18 in the top of the casing As illustrated, the bafile 15 is located between the front and rear headers 8 and 9 so as to provide passageways 19 and 20 at opposite ends so that a part of the products of combustion, after passing around the baffle 16, is free to pass into the space 14: through both of the passageways 19 and 20.

Another vbattle 21 is provided above the tubes 11, as clearly shown in Figs. 1 and 2, and this battle has portions adjacent the drum 12 and also adjacent and leading to the rear baffle 9. However, this bai'lle is discontinue-d within its length to provide an opening 22 for the products of combustion so that they may pass upwardly from the space 14: between the tubes 11 prior to passing out of the flue outlet 18.

A superheater 23 is mounted in the'upper portion of the casing 5 and includes rectangular box header 241. This superheater header is mounted in one side of the casing 5 and at such height that the top and bottom of the superheater header 24 are respectively above and below a horizontal plane including the boiler tubes 11, as clearly' sliownin V Fig. 1. In other words, a part of the superheater header 24 is located at a lower. level than the tubes 11 and another portion of the superheater header 24 is positioned above the level of the tubes 11.

. An inlet steam pipe 25 communicates with the steam and water drum 12 and with the superheater header 24, the connection of said steam pipe 25 with the superheater'header being at a level above the tubes 11. Thus steam passes from the drum 12, through the pipe 25 into the top portion of the superheater header 24.

A superheated steam take-off pipe 26 leads from the superheater header 24 at a position below the level of the tubes 11 and the superheated steam generated, in a manner hereinafter described, will be delivered through the pipe 26;

A series 27 of superheater tubes. are arranged in two groups 28 and 29. The tubes of each of these groups are eachbent in elongated U-shape form, the open ends of each tube being secured within the superheater header-24 so as to communicate therewith. he superheater header 24 is provided, in the present instance, with two battles 30 and 31 which form partitions which are spaced apart so as to produce three separate chambers 32, 33, and 34.

The chambers 32 and 34 are respectively adjacent the top and the bottom of the header 24 while the chamber 33 is centrally disposed. The inlet steam pipe 25 communicates with the chamber'32; The take-or? or outlet pipe 26 for the. superheated steam communicates with the chamber 34.

The upper leg portions or runs 35 of each of the tubes of the group 28 communicate with. the chamber 32 while the lower leg portions or runs 36 or the tubes o'l said group 28 communicate with the chamber 33. Qn the other hand, the upper leg portions or runs 37 of the tubes of the group 29 communicate with the chamber 33 while the through the lower runs 36 intothe chamber then out of the chamber through the i upper runs 37 of the group of tubes 29, and

thenthrough the lower runs of said latter tubes into the chamber thus producing a;

circulation of the steam while being superheated.

The tubes of both of the groups 28 and 29 are arranged in alinement with theopening 22 of the battle 21; The groups of tubes 28 are spaced above the group 29, as clearly indicated at 39, and this permits the groups i. 28 a nd- 29 to span the tubes 11. Thus the group 29 can be conveniently located within the space 14 below the tubes 11, while the group 28 will be positioned above the tubes 11. Furthermore, the tubes of each group 28 and 29 are arranged in staggered formation, as clearly shown in Figs. 1, 2, and 3,

. so that the products of combustion can pass between the bends of all of the superheater tubes.

Also, the corresponding tubes of each group are preferably positioned in direct vertical alinement with each other. Thus if any of the tubes of the groups 28 and 29 are in need or" repair or replacement, it is v an easy matter to cut thetube from the header and replacefthe same. The superheater thus made and arranged will absorb a comparatively large amount or heat and it is an easy matter to'insert or remove the superheater as a'unit since it is arranged at the top of the boiler casing, and it can be merely slid into position after the elements of the boiler structure are assembled.

' By having the superheater tubes arranged in groups so that they will straddle the tubes 11, a portion of the superheater tubes are actually between the elements of the boilerproper and thus receive a large amount'of heat.

In the form of my invention illustrated in Fig. 5 instead of having the super-heater header as above described 1 form the superheater header 49 in three separate sections,

' there being central section 41, a top section 42, and a bottom section43. The two groups 44 and '45 of superheater tubes are respectively arranged above and below the steam conducting pipes 11. r i

The superheater tubes 44 and 45 are U- shape inconstruction similar to those above described, and one leg of each tubev of the superheater tubes communicates with the central section 41 or the 'superheater header. In other words, the superheater header section-41 is in communication with both of the groups 44 and 45. The other legs of said tion 43 of'the superheater header has an out let pipe 47 for taking off the superheated steam..

. In the form' of my invention shown in Fig. 6,1 provide a single superheater header 48 which is divided-intotwo compartments 49 and 50 by means of a partition or battle The superheater tubes '52 are U-shape illustrated and have their open. ends respectively communicating with the compart ments 49 and 50 of the'superheater header 48 ,the arangement being such that the run 53 of the superheater tubes is positioned above the steam conducting pipes 11 and the "run 54 of the superheater tubes is below the steam conducting pipes 11. With this an rangement a steam pipe 55 conducts the steam from the steam and water drum 12 to the compartment 49 of the superheater header as and a superheated steam takeoff pipe 56 communicates with the compartment 50.

The construction shown in Fig. .7 is substantially similar to that described in connection with Fig. 6 with the exception that in stead of having a single superheater header the superheater header in Fig. 7 consists of two separate parts 57 and 58. The superheater tubes 59 have their upper and lower runs spanning the steam conducting pipes 11 in the same manner as described in connection with Fig. 6. The upper run communicates with the superheater header section 57, while the lower run of the superheater tubes communicates with-the superheater header section 58. In this construction the steam from the steam and water drum 12 passes into the superheater header section 57 through a pipe 60. A take-off pipe 61 for the superheated steam communicates With the superheater header section 58.

In Figs. 8 and 9 I have shown an arrangement of my invention in which two rows of steam conducting tubes 11 and 11 are providedso as to illustrate that my invention can be constructed on boilers having different numbers of steam conducting pipes between the rear watertube headers and the steam and water drum.

Instead of having the superheater tubes in the arrangement, for example, as shown in Fig. 1, I have angularly disposed these tubes, as clearly shown in'Fig. 9. In all other respects the construction illustrated in Figs. 8 and 9 is similar to that described in connection with Figs. 1 to 41: inclusive, and I have therefore given corresponding parts similar reference numerals.

IVhile I have described my invention as taking a particular form, it will be understood that the various parts of my invention may be changed without departing from the spirit thereof, and hence I do not limit myself to the precise construction set forth, but consider that I am at liberty to make such changes and alterations as fairly come within the scope of the appended claims.

Having thus described my invention, What I claim as new and desire to secure by Letters Patent is:

1. A superheated steam boiler including a superheater having a plurality of groups of tubes, the groups being spaced apart and transversely spanning a portion of the boiler proper whereby said tubes occupy spaces at opposite sides of said portion of the boiler, and a header for said groups of tubes extending into the boiler setting whereby the tubes and header can be freely removed as a ,whole from the boiler, substantially as described.

2. A superheated steam boiler including a superheater having a header extending into the boiler setting; and a plurality of groups of superheater tubes communicating with said header, said groups being spaced apart and spanning transversely a portion of the boiler proper whereby the groups of superheater tubes occupy spaces at either side of said boiler portion, substantially as described.

3. A superheated steam boiler including a bank of water tubes; other tubes extending at an angle to said first mentioned tubes whereby a space is provided; a flue outlet being provided above said second mentioned tubes; and a superheater having groups of superheater tubes spaced apart and spanning said second mentioned tubes whereby certain of said groups of tubes are positioned within said first space and others of said groups are positioned between said second mentioned tubes and said flue outlet, substantially as described.

4.. A superheated steam boiler having front and rear headers; a bank of water tubes connecting said headers; a steam and water drum; means communicating with said drum and one of said headers; tubes extending at an angle to said first tubes and communicating with said drum and the other of said headers whereby a space is provided between said first and second mentioned tubes; means providing a flue outlet above said second mentioned tubes; a superheater header; and a series of superheater tubes arranged in groups spaced apart and communicating with said superheater header, said groups spanning said second mentioned tubes whereby certain of the groups of tubes are positioned within said first space and the others of said groups of tubes are positioned between said second tubes and the flue outlet, substantially as described.

5. A superheated steam boiler having front and rear headers; a bank of water tubes connecting said headers; a steam and water drum; means communicating with said drum and one of said headers; tubes eX- tending at an angle to said first tubes and communicating with said drum and the other of said headers whereby a space is provided between said first and second mentioned tubes; means providing a flue outlet above said second mentioned tubes; a superheater header; a series of U-shape tubes arranged in groups and having their open ends communicating with said superheater header; and means within said superheater header positioned to form a circulation of steam, first through the tubes of one group and then through the tubes of another group, said groups of tubes being spaced apart and spanning said second mentioned tubeswhereby certain of the groups of tubes are positioned within said first space and the others of said groups of tubes are positioned between-said second tubes-and the line out let, substantially as described. T

()QA superheated steam boiler having front and rear headers; a bank of water tubes connecting said headers; a steam and water drum; 'means communicating With said drum andione of said headers; tubes extending at an angle to said first tubes and communicating with said drum and the other of said headers whereby a space is provided between said firstx-and second mentioned tubes; means providing a flue outlet above said second mentioned tubes; a superheater header; a series of U-shape tubes arranged in groups and having their open ends communicatingwith said superheater header; and means within said superheater header positioned to form a circulation of steam, first through the'tubes of one group and then throughthe tubes of another group said groups of tubes being spaced apart and spanning said second mentioned tubes where by certainof the groups of tubes are positioned within said first space and the others of said groups of tubes are positioned between said second tubes and the flue outlet, the tubes of each'group being arranged in a staggered formation for permitting a free circulation of the products of combustion therebetween, substantially as described.

' 7. A superheated steam boiler including a superheater having a header extending through the boiler setting and :a plurality of groups of superheater tubes communicating With said header said groups being spaced apart one above another and trans versely spanning within their heights a portion of the boiler proper whereby the groups of superheatertubes occupy spaces at either side of said boiler portion and the header andsuperheater tubes can be freely removed as a whole from the boiler; substantially as described. r

8. Asuperheated steam boiler including 'a bank of water tubes; other tubes extending at an incline to said first mentioned tubes,

whereby a space is provided; a flue outlet 'tubes are positioned between said second mentioned tubes and said flue outlet; substantially as described. v

In testimony whereof I have signed my name to thisspecification in the presence 0 two subscribing witnesses.

EDWARDS RUSSELL FISH. lVitnesses I Amos G, Go'rWALs, LEO A. GOTWALSL 

